If you're into other sources of caffeine, matcha can almost be described as instant green tea.
Have is very much not caffeine, but in appearance matcha reminds me of kava powder. I'd recommend it as an interesting additive (and mild anti-anxiety) when I make coffee smoothies with iced instant coffee and cashew milk (I much prefer regular milk but even skim has too many calories for me, and cashew is a little creamier to my taste than almond) The kava part is a bit of an acquired tasted, but adds a nice tingly feeling once you get used to it. It just needs a lot of shaking in a shaker smoothie cup, or a blender, to mix nicely otherwise it gets clumpy. Definitely a very high-latency option.
It is a higher latency option if using the traditional container along with a thermos as one has to wait for the water to cool under 80C. It is also higher throughput in the sense that one continues to refill their container with water from the thermos a number of times until the plant matter has given its all.